Question

What is the Python equivalent of following Perl code?

hmac_md5_hex($login . '^' . $seq . '^' . $time . '^' . $amo . '^', $CryptoKey); 

The Python hashlib.md5 doesn’t seem to take an ‘cryptographic key’ argument. It only accepts 1 argument.

Answer 1

You have to use the hmac module together with md5 or sha. Per default it uses md5:

In [1]: import hmac, hashlib In [2]: hmac.new('key', 'msg').hexdigest() Out[2]: '18e3548c59ad40dd03907b7aeee71d67' In [3]: hmac.new('key2', 'msg').hexdigest() Out[3]: 'a4bde113179bc2a7c6ac9ad7309ea073' In [4]: hmac.new('key', 'msg', hashlib.sha256).hexdigest() Out[4]: '2d93cbc1be167bcb1637a4a23cbff01a7878f0c50ee833954ea5221bb1b8c628' 

Your example would probably look something like:

hmac.new(CryptoKey, '^'.join([login, seq, time, amo]), hashlib.md5).hexdigest()